R44 BMW F Series B58 Exhaust 200 Cell Euro 6 (Non-CEL) Sports Cat Downpipe (M140i, M240i, 340i, 440i, G30 540i & more)

The R44 BMW F Series B58 5.0″ 200 Cell Euro 6 (Non-CEL) Sports Cat Downpipe is engineered for customers seeking maximum exhaust flow and sound improvement while retaining a high-quality sports catalyst. Manufactured from high-grade stainless steel, this large-bore 5.0-inch design dramatically reduces exhaust restriction compared to the factory downpipe, allowing the turbo to breathe more freely. Featuring a 200 cell Euro 6 sports catalytic converter designed to be non-CEL when correctly configured, this downpipe delivers faster turbo spool, sharper throttle response and a more pronounced exhaust note, all with precise fitment and a sensible price point.Key FeaturesHigh-grade stainless steel constructionLarge-bore 5.0-inch pipe diameter for maximum exhaust flowHigh-flow 200 cell Euro 6 sports catalytic converterDesigned to be Non-CEL when correctly coded or tunedSignificant reduction in exhaust back pressureFaster turbo spool and improved throttle responseEnhanced exhaust sound and presenceIncreases tuning potential of the B58 engineSupplied with a 1 year R44 Performance warranty and fitment guaranteeEngineered for accurate fitment across multiple B58-powered BMW modelsImportant Disclaimer – Motorsport-Use RecommendedWhile this downpipe features a Euro 6 200 cell sports catalyst, fitment may still breach emissions and noise regulations depending on vehicle specification, tuning level and regional legislation. Vehicles fitted with this downpipe may fail a UK MOT test, particularly when combined with aftermarket software.Installation may trigger an engine management light, and custom coding or aftermarket tuning may be required to ensure correct operation, even on Non-CEL configurations. R44 recommends this product primarily for motorsport-use or closed-course applications and advises customers to check local regulations before installation.CompatibilityBMW M140i (F20 / F21)BMW M240i (F22 / F23)BMW 340i (F30 / F31)BMW 440i (F32 / F33 / F36)BMW G30 540iOther BMW models equipped with the B58 engine